HobbyKing Online R/C Hobby Store : TURNIGY Sentry 40amp Speed Controller

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30/08/2010
1st heli (80%)
1st heli. New to the electric flying. (25yrs gas modeler) New world! Can anyone with tech. knowledge please explain the diff. between linier and swithmodes BEC.Many newbies will want to know. Or maybe a site with knowledge specific to teckno info for beginners. This HK site has really got me interested in the elect. bit as u can afford to try it. Got 3 x 450's flying great. Thanks HK.

F-O-D- (67%)
"The main difference between linear and switching BEC's is where the voltage is dropped under the load of the radio system. As more current is used to drive servos and power the receiver, the more the voltage drops under the load. With a linear BEC, the voltage drop is seen at the receiver side of the BEC, where a switch mode BEC the voltage drop is on the battery side of the BEC. In the case of the switch mode BEC the receiver sees a more constant voltage and is much more stable because the voltage is regulated."quoted from haiduk from rcgroups. Also look up attf (All Things That Fly podcast 03dec08)these are done by Lucien Miller. Extremely helpful and knowledgeable.
***********rcgroups****/forums/showthread.php?t=1054421

Bernd (72%)
A linear BEC will convert more electric energy to heat, a switched one is more efficient and can supply more amps at a given size. You'll experience the difference (only) in a heli with 4 servos. Digital servos need even more power. Bottom line: For 4x digital servos get a switched BEC.

1st heli (80%)
1st heli
thanks guys happy flying

26/08/2010
PaulAustralia (100%)
What does "No ETA on 1 item" mean? I have been waiting 4 weeks now with no customer feedback!

F-O-D- (67%)
Have also been waiting since the 4th. I want my speedy now please. Also no feedback!!!!

scottybr (31%)
This seems to be the worst thing about HK. I don't think they even know when they are going to get stock in. An ETA would be nice and if they knew it was going to take longer than the ETA, it would be nice to know that too.

Bernd (72%)
ETA - Expected Time of Arrival. Means they don't know when it will arrive.

F-O-D- (67%)
Have they opened a wharehouse in Australia?

15/07/2010
Michisw (87%)
Does anyone know how often new stock arrives? I wanted to order one of these but none is left. Or is there an alternative?

Igor (67%)
unfortunetly we need to wait, but by my experience entering every single on the site, the avarage time is about 2-3 weeks 15-21 days, i you let me advise you, order even if its BK(back order) because this esc is very popular and disapear in the day it arrives... by ordering now you garantee your as soon as arrives!
im no from the store... and dont doing marketing, sorry if apear like that!

DaveGahan (-12%)
Hi! It's the same question because there was still no change in the availability of this product... I have ordered this item on July, 29th. I don't need it as soon as possible, there was just the wish to have a 40A ESC at home. I know my kind, there will be a new project soon, even if I have a full hangar. It was allways like this and I never could fight against it... *-) I like this ESC very much, because the two I allready own are perfect. For this price, I think there is no better ESC outside! BUT: 3 weeks is a long time, so there will be a moment in the very next fututre, when it should be good, to look for an alternative. So, if you guys have found another interesting 40A or 60A ESC here at HK, let us know about it, please. But you should allready have it in use. That would be nice ! THANKS !

23/06/2010
Glenn (32%)
Goods arriving every 14 to 21 days.

Make it 30 I love this esc man

11/05/2010
Waco (75%)
Hi, is it possible to "switch off" BEC on this ESC and use it as Opto with separate Battery for Rx?

Waco (75%)
Already I know, how do it. It is necessary to disconnect the red wire from lead to Rx connector and it is!

norbique (-7%)
Just pull the red wire out of the connector, add a piece of heat-shrink on it to prevent shorts and you're done. No BEC.

aramid (27%)
Sure! You just need to disconnect the red wire from the servo lead connecting the ESC to the receiver. If you're sure you'll never want to use the BEC, you can just cut the wire, but if you might want to reverse the process it's better to lift the plastic keeper in the plug and just slide the wire out, then heatshrink it out of the way. You can also use a short servo extension with the red wire removed. Bear in mind, though, that this ESC already has a 3 amp switching BEC. There's nothing wrong with using a receiver pack, but you're also not dealing with a hot, inefficient linear regulator.

steven (59%)
You can remove the red wire to your rx to disable the bec. Use a small screwdriver or pick and remove the terminal from the connector and tape it up.

Either that or just cut it.

tommo85 (39%)
Unplug the red wire from the conector, or cut the red wire, or use a servo extension and plug it in between the receiver and the ESC and cut the Red wire on that. Saves damaging a more expensive esc when you can cut a 20cent extension. The constant positive wire is the wire in the middle on the 3 core flat cable.

DobX1 (44%)
You need to cut the red cable on the BEC wire towards Rx.
It cannot switched off by programming.
I recomment to use a short lead extension for the BEC cable and cut the red cable there, to keep the ESC untouched.

avionero (60%)
Yes is very easy, simply cut the red cable in the signal conector to the receiver. This red cable gives the 5 V to receiver. The ESC only needs the 0V (black cable) and the speed signal. The ESC runs thru the voltage from the Lipo battery. If you do not like cut the red cable, is easy remove the pin from the plastic case of the connector.

26/03/2010
paul222 (72%)
Please, has anyone verified by specific testing that the Sentry 40A ESC incorporates switch-mode BEC? The labelling says "BEC Ver3.1" (like the Plush 40A ESC) and NOT "UBEC Ver3.1" like the higher poer Sentry (or Plush) ESCs. I'm guessing the HK narrative is misleading and that the lable is correctly indicating linear-mode BEC, NOT UBEC. Anyone categorically prove me wrong? (I'll be happy if you do !). "359fishing" posed this same question on 28/12/09 - are we the only two site visitors who are uncertain ?? Surely not ?!

aramid (27%)
I cannot prove absolutely one way or another, but I'm 99% positive the Sentry line, like the Plush line, now uses a switchmode BEC on all models 40 amps and larger. Turnigy ESCs are rebranded Hobbywing items, and the equivalent Hobbywing has a switching BEC. The Plush instruction sheet claims a switching BEC. The Plush and Sentry 40amp and larger have green ferrites on the servo lead, while the smaller models do not. All three of these facts suggest that the BEC is switchmode - in fact, the only evidence we have *against* the switching BEC is HobbyCity's own description. I think the description simply needs updated.

4/03/2010
SteveO (67%)
Where can I find the manual for this ESC?

r_g_r (88%)
Hi,
this is a re-branded Hobbywing ESC.

This is the manual:
www hobbywing com/upload/manual/ESC_e.pdf

Greets!

18/02/2010
vinay2070 (18%)
Why is this item cheaper than the plush 40A.

Also the burst amps is only 43 Amps compared to the Plush's 55 Amps? Some on in the review says he has used it above 50 Amps. Which is correct? confused!

Extra Rc (54%)
this is a fault , in the manual it clearly sais that the burst current is 57 amps !

norbique (-7%)
It's totally the same ESC as the plush, just with the extra board (and IC) to monitor individual cell voltages to prevent over discharge of any cells in the pack.

25/01/2010
gazsobasi (63%)
Hey everybody,
i just ordered Turnigy 40A sentry ESC. What i want to ask is, will i be able to use this ESC without any set up? The motor im considering to use with is, Turnigy SK 35-36 and 3S lipo. Servos will be 9g turnigy servos. Do i need to make any set up for those or just plug and fly?
i appreciate any responses.

trucheek62 (85%)
put timing on high. very good speed controls. best if using programing card.

LuboTB (43%)
You can! Plug-n-fly!

14/12/2009
Dreddix (72%)
Hi HobbyCity! Any ideas when this one comes to stock?

DobX1 (44%)
It is on stock

11/10/2009
Rob (58%)
TURNIGY Sentry 40amp Speed Controller

I like to know what is the best setting of timing with the Turnigy 2836 Brushless 450-Size Heli Motor 3700kv, for my HK450
disone have 6 magnetic ***l
There is no manual in the package

thanks

haijorno (74%)
look for manual of turnigy esc manual its will be the same.

Igor (67%)
to use this esc in chopters you should program timing to soft-super soft like the manual expllains.
here goes the link to the manual.

www hobbywing com/upload/manual/ESC_e.pdf

1/10/2009
Extra Rc (54%)
does anyone know when it will be in stock ??????

haijorno (74%)
maximum 1 month. put reminder to your mail when stock in.

20/09/2009
duquenne (67%)
Hi,

Where can I find the manual or date sheet for this ESC?
I want to program it throught my radio.....like with other esc

By

Zbigniew (63%)
They are rebranded HobbyWing ESCs...

***********hobbywing****/upload/manual/ESC_e.pdf
GUARD -> SENTRY
PENTIUM-> PLUSH

18/09/2009
steve (82%)
I have a Sentry esc and also a Plush and Tower Pro. I am having a problem. For example, on a Turnigy 35-36b motor, the Tower Pro sends over 400 watts. Both turnigy esc's only deliver 230 with same prop.I tried changing the timing on the turnigy escs, but no change. What's going on?

11/09/2009
Piero (82%)
What about the balancing connector? It seems to be suited for a 2S, 3S and 4S battery, but it has only 3 wires. How can it work with a 3S or 4S battery?

RGibson (48%)
I assume it has it's own circuitry and communicates with the BESC digitally.

HAL-9000 (72%)
One more thing to keep in mind. When you connect balance plug first, then discharge plug - it monitors each cell. If you connect discharge plug first, it only monitors total voltage of pack.

10/09/2009
Ganimed (79%)
what please does the " Govenor mode" do?

RGibson (48%)
Supposedly adjusts output power and maintains motor RPM regardless of load, rather than simply supplying a fixed power to the motor. Typically only used with helicopters, because they usually operate at a fixed RPM.

26/08/2009
ddekel (82%)
Can it work without connecting the battery to the balancer port?

my battrey balancer port is already connected to this

***********hobbycity****/hobbycity/store/uh_viewItem.asp?idProduct=7223

Extra Rc (54%)
well i don't know if it will work without the battery monitor connected....... you could just buy a turnigy plush 40A... it does not have the extra
battery point .... hope it helps :P

ddekel (82%)
Thanks
Plush 40A is out of stock...

EgWel (82%)
Yes, it will work without connecting the balance plug. And also note that a plush has a lineair BEC, while this Sentry has a switched BEC. This is always better imho. Especially if you use 4S lipos.

8/08/2009
grits (74%)
Good ESC, but where is the governor mode?

It does not work from the programming card, nor does the manual mention it, so come on Hobby City, publish an instruction please.

A few others appear to want to know this too.
If someone has a link to instructions, please post it here, I'm sure people will be grateful.

sendorm (55%)
This card doesnt have a governor mode. All other functions does indeed work with the programming card. Just dont forget to connect the card to the esc before you connect the batttery.

10/06/2009
Jalillo (53%)
I�m in backorder since 1/06/09, need to know when it will arrive please.

10/06/2009
tardis (88%)
what please does the " Govenor mode" do/ and how do you turn it on? on the Turnigy 40 amp plush speed controller. Thank you. James

andsti (54%)
governor mode means the ESC will keep constant headspeed of your heli during flight - good for beginners. When you connect your programming card, you have the choice to switch on or switch off the governor mode.

10/06/2009
worldedit (67%)
Does it have a governor mode?
I switched it on with my programming card but couldnt tell the difference.

DaRippa (59%)
I have the same problem with the Sentry 25A ESC
Used the Turnigy Programming card to set up the Governor-Mode, but nothing changed.
Do i also have to change something at the Transmitter (MX12)?

andsti (54%)
yes it does have a governor mode but it will not be activated via programming card. There is a procedure by stick input to be programmed, you'll find it at heliguys

Alavion (89%)
please, what is this procedure? I cant find it in heliguys

briangp (89%)

1. Set your throttle curve to 0 flat
2. Arm your receiver
3. set your throttle stick to mid stick verify in throttle curve to 50/50
4. increase throttle till you find desired head speed using digital taco
NOTE: this MUST be between 75% and 85% otherwise change pinions
5. power all off
6. Pull out programming card plug in esc
7. power esc up
8. set super soft start (important)
9. set mid timing (also very important as low timing governor mode does not work)
10. set governor mode ON
11. Power all off and power on and verify with card that programming took!
12. Plug everything back in again
13. turn transmitter on and move transmitter stick to high position
14. power receiver and esc
15. wait till you hear two beeps (esc says I know your high position now)
16 move to low stick position
17. wait till you hear some music (interesting tunes)
18. wait till you hear one long beep (ESC say I know your low position now)
19 immediately after long beep switch on throttle hold (which was set to 0% by default)
20. power off receiver and esc
21. leave throttle hold on
22. turn on transmitter and the receiver
23. have digital taco ready again
24. with transmitter at 50% stick again starting at 0 throttle slowly increase
25. set throttle curve to some value that obtains the desired head speed (Note it is different now may be anywhere between 70% and 90%, mine way 76%)
26. power off by first using throttle cut the unplug power
27. ensure your cut / kill is 0 or -5%
28. now make a flat throttle curve to that value you just obtained
29. switch off transmitter power everything back up in normal fashion except have the cut / kill ON
30. power up heli as per normal
31. have a flight and all works fine.

23/04/2009
Marcin (54%)
When it will be in stock again?

Jalillo (53%)
same question since 1/06/09

Tigerhawk (28%)
Just a little question,
is this controller provided with its
battery, motor and receiver connectors?

Thanks in advance

lolsen (-18%)
Yes, I think so!

Burnaby (71%)
Just Receiver connector. Bare wire on battery and motor.

Larry (70%)
I lost the progaming info for stick programing the sentry 40 where can I get it.

anhelico (96%)
It is a good regulator, and blows with the security of having the Lipo protegidas.Una purchase very interesting

EgWel (82%)
As i'm using a programming card (recommended!) myself i'm not 100% sure, but here is a manual that should work:
***********hobbywing****/upload/manual/ESC_e.pdf

kctrading (44%)
Anyone know if the prop brake is stronger on this esc than on the Plush 30A? Plush 30A has a hard time holding a 8x6E prop even at lower speeds.

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